diff --git a/pdf.c b/pdf.c
index c2d370e2a67ee3320b3b7ed10179087ef21e2ecb..563f04564f1b222ec6789657acf2d6b443498f63 100644
--- a/pdf.c
+++ b/pdf.c
@@ -274,8 +274,8 @@ act_hdigitpair(const HParseResult *p, void *u)
 			default:
 				break;
 		}
-		assert(digits_processed == 2);
 	}
+        assert(digits_processed == 2);
 
 	b = (digits[0] << 4) + digits[1];
 	return H_MAKE_UINT(b);